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II \v THEIR (Ittornegs United States Patent FRONT FEED CARRIAGES FOR ACCOUNTING MACHINES Raymond A. Christian, Arthur R. Colley, James H. Crawford, Jesse R. Ganger, and Robert C. Mitchell, Dayton, Ohio, assignors to The National Cash Register Company, Dayton, Ohio, a corporation of Maryland Original application December 6, 1947, Serial No. 790,032. Divided and this application May 9, 1951, Serial No. 225,312

24 Claims. (Cl. 197-128) The present invention relates to calculating machines and particularly to machines of the accounting or bookkeeping type which are provided with a traveling paper carriage for supporting the bookkeeping forms and also for automatically controlling the various functions of the machine in accordance with the columnar positioning thereof.

This application is a division of the co-pending application for United States Letters Patent filed on December 6. 1947, by Raymond A. Christian et al., Serial No. 790,032, now Patent No. 2,626,749, issued January 27, 1953.

In the business world of today, there are nearly as many different types of bookkeeping systems employed as there are separate business organizations. It has, therefore,

been necessary for the builders of bookkeeping or accounting machines to frequently modify the designs of their machines in order to adapt them to the particular bookkeeping system employed by the prospective purchaser. These so-called customer order machines are costly to build, since certain portions of the machine must be practically hand-made in order to furnish a machine having the desired characteristics. Accordingly, it is an object of the present invention to provide a solution to this problem of adapting a particular type of accounting machine to fit the bookkeeping system utilized by any particular customer. This has been done in the present instance by designing an accounting or bookkeeping machine which is sufficiently flexible in character that it may be used in connection with practically any of the complex accounting systems used by present-day business establishmerits.

Another problem confronting both the manufacturers and the users of accounting machines is the complexity of many of our present bookkeeping systems. Not only is it difficult to construct machines which are capable of performing the many and complicated operations involved, but it is also diificult for the operator of the machine to learn how to manipulate the various controls of the machine so as to properly perform the various operations involved in making an entry on the books. It is, therefore, a further object of the invention to provide a bookkeeping machine which will perform most of these operations automatically and therefore require a minimum amount of time and attention on the part of the operator of the machine.

A further object of the invention resides in the provision of a simplified type of front-feed paper carriage. This carriage is driven in both its forward direction and its reverse direction by a hydraulic drive mechanism which is operated by the same motor which serves to drive the main operating mechanism of the machine.

Still a further object of the invention is to provide a traveling paper carriage having an improved type of front-feed mechanism.

A further object of the invention is to provide a paper carriage having a front-feed mechanism which is operable either under the control of certain manipulable elements "ice on the keyboard or under the control of the paper carriage itself.

An additional object of the invention is to provide a traveling paper carriage having a split platen with a novel type of paper feed mechanism therefor.

With these and other objects in view which will become apparent from the following description, the invention includes certain novel features of design and combinations of parts, a preferred form or embodiment of which is hereinafter described with reference to the drawings which accompanying and form a part of this specification.

In the drawings:

Figure 1 is a longitudinal sectional view of the rearward portion of the machine taken just to the right of one of the amount banks.

Figure 2 is an exploded perspective view of one of the carriage stops used for controlling the various functions of the machine in accordance with the columnar position of the traveling paper carriage.

Figure 3 is a front view of a portion of the motor drive mechanism for the machine.

Figure 4 is a cross-section taken through the hydraulic coupling mechanism which drives the traveling paper carriage back and forth across the machine.

Fig. 5 is a plan view of the motor drive mechanism, the hydraulic coupling device, and the time delay switch for turning off the motor after the machine has stood idle for a predetermined length of time.

Figure 6 is a cross-sectional view of a portion of the electric typewriter mechanism as viewed from the righthand side of the machine.

Figure 7 is a cross-sectional view of the typewriter structure showing the complete train of mechanism from the keys to the type levers.

Figure 8 is a cross-sectional view taken through the traveling paper carriage, showing in particular the front feed mechanism thereof. in this view, the mechanism is in its closed position.

Figure 9 is a detailed view of the forward compression rolls and the supporting and biasing means therefor.

Fig. 10 is a sectional view through the carriage showing the throat mechanism in its open position.

Figure 11 is a plan view of certain of the operating mechanism for the front feed and line-spacing mechanisms.

Figure 12 is a cross-sectional view taken through the traveling carriage, showing the journal sheet and ledger card guides, the upper and lower compression rolls, and the operating mechanism for the rolls.

Figure 13 is a view showing essentially the same structure as that shown in the preceding figure, but with the upper and lower compression rolls in their open or disengaged positions.

Figure 14 is a right-hand view of the paper feeding mechanism mounted on the travelling carriage.

Figure 15 is a detail view showing part of the mech anism illustrated in the preceding figure on a larger scale.

Figure 16 is a vertical section taken through the platen for the purpose of illustrating the split construction of this mechanism.

Figure 17 is a detail plan view of the split in the paper" feeding mechanism for the two-piece platen.

Figure 18 is a cross-section taken along the line 18-48 in Figure 16 and illustrates in detail the mechanism utilized for rendering the platen either split or solid."

Figure 19 is a cross-section taken along the line 19-19 in Figure 16 and illustrates some of the details of the variable line-finding mechanism employed herein.

Figure 20 is a cross-section taken along the line 

